{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,17]],"date-time":"2025-10-17T13:43:06Z","timestamp":1760708586626,"version":"build-2065373602"},"reference-count":44,"publisher":"MDPI AG","issue":"6","license":[{"start":{"date-parts":[[2013,6,20]],"date-time":"2013-06-20T00:00:00Z","timestamp":1371686400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/3.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Remote Sensing"],"abstract":"<jats:p>This study evaluates the potential of C- and L-band polarimetric SAR data for the discrimination of iron-mineralized laterites in the Brazilian Amazon region. The study area is the N1 plateau located on the northern border of the Caraj\u00e1s Mineral Province, the most important Brazilian mineral province which has numerous mineral deposits, particularly the world\u2019s largest iron deposits. The plateau is covered by low-density savanna-type vegetation (campus rupestres) which contrasts visibly with the dense equatorial forest. The laterites are subdivided into three units: chemical crust, iron-ore duricrust, and hematite, of which only the latter two are of economic interest. Full polarimetric data from the airborne R99B sensor of the SIVAM\/CENSIPAM (L-band) system and the RADARSAT-2 satellite (C-band) were evaluated. The study focused on an assessment of distinct schemes for digital classification based on decomposition theory and hybrid approach, which incorporates statistical analysis as input data derived from the target decomposition modeling. The results indicated that the polarimetric classifications presented a poor performance, with global Kappa values below 0.20. The accuracy for the identification of units of economic interest varied from 55% to 89%, albeit with high commission error values. In addition, the results using L-band were considered superior compared to C-band, which suggest that the roughness scale for laterite discrimination in the area is nearer to L than to C-band.<\/jats:p>","DOI":"10.3390\/rs5063101","type":"journal-article","created":{"date-parts":[[2013,6,20]],"date-time":"2013-06-20T13:29:43Z","timestamp":1371734983000},"page":"3101-3122","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":17,"title":["Evaluation of Digital Classification of Polarimetric SAR Data for Iron-Mineralized Laterites Mapping in the Amazon Region"],"prefix":"10.3390","volume":"5","author":[{"given":"Arnaldo","family":"Da Silva","sequence":"first","affiliation":[{"name":"Institute of Geoscience, Federal University of Par\u00e1 (UFPA), Rua Augusto Corr\u00eaa, 01-Guam\u00e1, Caixa postal 479, Bel\u00e9m-PA, 66075-110, Brazil"}]},{"given":"Waldir","family":"Paradella","sequence":"additional","affiliation":[{"name":"National Institute for Space Research (INPE), Av. dos Astronautas, 1758-Jardim da Granja,  Caixa Postal 515, S\u00e3o Jos\u00e9 dos Campos-SP, 12227-010, Brazil"}]},{"given":"Corina","family":"Freitas","sequence":"additional","affiliation":[{"name":"National Institute for Space Research (INPE), Av. dos Astronautas, 1758-Jardim da Granja,  Caixa Postal 515, S\u00e3o Jos\u00e9 dos Campos-SP, 12227-010, Brazil"}]},{"given":"Cleber","family":"Oliveira","sequence":"additional","affiliation":[{"name":"Latitude Consultoria Ltd., Av. S\u00e3o Jo\u00e3o, 2400-C-201-Jardim Colinas, S\u00e3o Jos\u00e9 dos Campos-SP, 12242-000, Brazil"}]}],"member":"1968","published-online":{"date-parts":[[2013,6,20]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"1483","DOI":"10.1080\/014311697218232","article-title":"Airborne and spaceborne Synthetic Aperture Radar (SAR) integration with Landsat TM and gamma ray spectrometry for geological mapping in a tropical rainforest environment, the Caraj\u00e1s Mineral Province, Brazil","volume":"18","author":"Paradella","year":"1997","journal-title":"Int. J. Remote. Sens"},{"key":"ref_2","first-page":"76","article-title":"A geological investigation based on airborne (SAREX) and spaceborne (RADARSAT-1) SAR integrated products in the Central Serra dos Caraj\u00e1s Granite area, Brazil","volume":"21","author":"Paradella","year":"1998","journal-title":"Can. J. 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